Holster platform



FIG. 1 shows a perspective view of a design for a holster platform;

FIG. 2 shows a front view of the design;

FIG. 3 shows a rear view of the design;

FIG. 4 shows a right view of the design;

FIG. 5 shows a left view of the design;

FIG. 6 shows a top view of the design; and,

FIG. 7 shows a bottom view of the design. 

CLAIM The ornamental design for a holster platform, as shown and described. 